#include<iostream>
#include<functional>
#include<string>
using namespace std;

void Print(string str,int num)
{
    std::cout<<str<<":"<<num<<std::endl;
}

int main()
{
    auto func=std::bind(Print,"110",std::placeholders::_1);
    Print("nihao",10);
    func(20);
    return 0; 
}